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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9ad423d688c7339fa5d2698b16ae32a86e31935133f9fcc2586e1d6850baf2e' 
  AND token = 'YlV5NUHhDfrsTtKRIsjFUHCYWTCBhT8AfFwTj86XoZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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