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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5504687bf288ebede36e96eac02de3e057cf7f4cd2a7696886c6ba33a9b66848' 
  AND token = 'W1ODKM9aFo31RsQli7ITsh0kZC1OG5GxSl+k1LP3wH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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