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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1411c7fe8c41ca0810c5ab3e4e951a7e39acc4c227548367b96ce06f12d54e7' 
  AND token = '+3olrwaceCk7+lsigVLSImDcd+5HUlnugrXegVcN0sY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}