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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de5486a58425e48cd10e0f1c41e0feced8c0c0e4fc50fb4b83a3676161c594ca' 
  AND token = 'OWnc6ievI9dR7cLlJCWhvJihxZ1RPwR5qALf56D3qY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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