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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0f69e3153acfb0e09cd094ec12c1f1528fe1adf676a8d4addf25fc5c96bc533' 
  AND token = 'jJEvAVPRJUsYvIDVISTuD3jSg4HFDQXcbKRACjU9A7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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