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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97490283e195c2cc0dab237e03afa7440d3ab2e4a7042882ef17e83946cc338c' 
  AND token = 'LHDYWuU39DlR97x/8Z15x9i/o0klu4l+2SkfYaXOJig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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