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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3af707bbc8646964f438443c37cc15c5d53206c3228fa6575aadd8bbc0e50e3' 
  AND token = 'TmSsoogyc/C0hsRoEzG0JOb4omRYqWx/Urx72z6Fssc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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