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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b381e8ca832d959c56b06934ed084d2efd5b2115224e7b02a76b7b048204e30' 
  AND token = 'tHKjL3NCFA4m20mExEufch2b0G5Tioba9Iv1ZkuR8Ws=' 
  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"
    }
  }
}