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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1069fe4451a8f1120ae95e9f0858a1a8ecf459ec894ac0b875cbd1de4aaafe26' 
  AND token = 'F+KNFjo6oX/M5x6Uo8lRIbFr+crYMnl2Vywrjn2se1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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