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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e72700659c1fad0ca2367118abc2287d6c07f1e25e60eba47977867ced62cf25' 
  AND token = 'BW8accxqJq/fhIkNx4g1apx8eoyWhhh7m85R+DdY5vM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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