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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be017625c853d4ee9e734e1dc79c5c023f4895b97459d2a55f661051fcc7d514' 
  AND token = 'XeGFN82K9lN9nrEvljKi/RqBrWpzeS1CW/9d9wIG9Nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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