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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8074671b3cf2d4cf202aa7a4770748ce4b41fbbb0047b6cd1ac1655b54e27c14' 
  AND token = 'jXcWRWh0aJSqZl/ZF7xOXkYyBeowiI7fuwttXUaFAyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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