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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '701a01517776d3ec1b90b90c62857b9565b0e48d97ed92226bed6d0e805268a4' 
  AND token = '737uGuJI88j6xPym+gj033ljJ/DJHg9drvnLIXup4is=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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