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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3810a9e714e3ede9b5e828e84ebbb200a5559715bdf2b0077b5f526ee888bc4d' 
  AND token = 'BIYyd8bhtx15a4k2KZcDJEeniLCk8WOkb9onCi15H4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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