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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '45e93364be7241b17b9c16e191e89a9f6d7ddd4324da49221b173213cd578bd9' 
  AND token = 'hxlaY1XgTgsQCs7wV3ABL3yzeOsvHJ0gHzSz8sc/79I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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