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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636eded85f27e56d3133be3f9b6bed62da573f7838e0c2ecbacce896b20ec8aa' 
  AND token = 'Glfw1AHh36StCFtQg7E+i2ZGlGZES5RZ+2YhXs/IYK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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