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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f70f826c22a45d69ff56e0478b22c0ac4770d59ed03fce0e608a4ec04c6e49f3' 
  AND token = 'W1qhBVm28aAwqUyvCy53oGWwfi4pezCEqCiklBcGocA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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