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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfaf9ec0e63d6e64574995471379c20ee7039ccb66229f2ac38a82a747a3bf3f' 
  AND token = 'p1weVBSBkcuCqCEWl1SBOZbalGJVzW1J47iiejh5z84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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