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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ecb70e1aa879cfb8b18fea5da3ba5c10d1a49f0de211539872852fd901d4147' 
  AND token = '94xGSf38CwJ97HXlt7OGepP1Wif11aDqPqpvL0AgYc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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