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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeb1d5e24ff013286d385a02e370dcee1380c3c2880941dc486109a4b4f51fc8' 
  AND token = 'NC5tvG5wz2k5fA/HGlrUQUNSFFhewB25TPHSO9nYCOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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