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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aceb974d7dc95dabe725fd983bf505d0fd0425adc9f79311566c5f42975ecc97' 
  AND token = 'QIFqs9/DUX4C5kVCTPN/Ma4a0ktn9LGP7n2EiR5694U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}