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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba293543808e1edb856b4c6ea1b9ebd391722c4f12cb4cc123d73763dddb95cc' 
  AND token = 'bxR1XbvF6SE7FmMjMMSHaAKVGS8FAMup4uj+9rn97hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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