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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0dc2c0437d92de5204747ab36ba1da98f9c36da6a1708ac7889e2beda0056d74' 
  AND token = 'Qwln6mI3/uYpd05BatnK3Hv0wgUAb0VvjEaV65Dq8UY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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