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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f07cb26d0681cdab2e6a708d28616f5990891cb766a084fb68c3cdc15f83ee0' 
  AND token = 'uW0WmS7xXJT5tqxwRIcykirS9n/Z8DgBE4cWe1EFK4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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