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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1da47cb124835837c3104ac20c3e8c1ac33edfa5282ebd53229ba4aa89039c04' 
  AND token = 'cVNeDvY5VwIoSV6a+6sSUSfQ1dP2MxX2srL13KB+4vM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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