SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e070b22820e3a6d5fbca4d6e5f4b0b5059d735684a74387b37bd144d6609cea1' 
  AND token = 'JgjK+J+ewFVMAlSzBEmDyXTOGcV0QE4sOoYv6/qqK1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}