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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '682e8ea3d8095cfa522a0db0d601ded5a8b7985977e082ba45e4d16f389e4f5e' 
  AND token = 'SNCoERKtKnpfEw/35eKteTR0Q+UCG6CA2uSkmg9PvD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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