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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba4a6a974f32380c3ca7ff60420ef3a6a3fa24bb5100b04cc583af309df09f0' 
  AND token = 'lTuFN6p1SNdYsei5YXIhG6fxDn45SYuQxLo2t6kyODM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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