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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5899237c2aadde3d89ba325af3955967bcf598d4ff82962abbfd1b2b00eab083' 
  AND token = 'iPgMmqpitcYH7lj/Jb+430yuDNPcLyluk819HjyWpMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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