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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ceb1eaee1ff89d539ef1ae36ab859f5081aa091ff7cb6f54c59d106bfac0c77' 
  AND token = 'RzN/Jjm1v+ZwQStEDNant7BveXRiuSeWjAoqv0gPKSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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