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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67b87b476aa8bd8ee2a1855f88dc4bb36eeb192634acd08f8bcbc259e5f4e882' 
  AND token = 'HF6SSzKZ3bJ7g6c8T6mhrxUHGnU9suh9mHc8B+Kjep8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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