SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7dae03b68cbca7cb13c5bb9273178d5aec6484cd139268e1a3a635f7899ce769' 
  AND token = 'CEZhXksG2ChYqEsW1H/NW8Y/tLJU54XrQUfUdxgNj6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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