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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0160768caf84c2ba4dd50be2e9a15101e8d36e2cfe2a6e553470972eab9e93ac' 
  AND token = 'A9CCk/b6FTntlEFWCkzu6Y/uV1qzvJO9KqIuDKWOa7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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