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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '41a5b953d73153bd766b7b06466565ceefeaf399eba80697cfa6c3a87b72d8fb' 
  AND token = 'ST7s05aW29yArYSd26EZjw/6LIpfkSk5F5pM8ALpFhA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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