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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd95927918e2a7b2986e8b96e7b4f302c15cfc427935f6de431da22c060fabe3e' 
  AND token = 'hrRSMzXu97JT/6JfBL25e1O2ZLilIs8yfc3oRamRX1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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