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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef15acb630ca18b9a903feced1284c1c1e5f9c283dbb11e34644c4e33d5584f1' 
  AND token = 'Ueogl310cH4eBjuVn9d1U47xgM1xdWqgp0mRcCsSKws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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