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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0445142a2a2dbe2eefe860b1b4512411a534e3ac70f3826fe76c8a466880a235' 
  AND token = 'urBaoXaMef7tn4EWBnLK1REvplSXlGOmZoUWpqW/fGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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