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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc212716a82266034aabd93a7164fee65f188a0cb87a5d37f6bdf0b5a1826181' 
  AND token = 'VRY2f02QEOn3t2XgkiIsVHKZ7+syiLktN94LgNuIZCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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