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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ecb0126baf0295bd9002c568b99f7e74eeb629cb9701f8d962f63524a387181' 
  AND token = '0nTEWmcHqBNhZ3OCv0Gq6H+mNfmCD5QW8d7uktoCYoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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