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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bee45fc9fb7345a7e59f7beb183b1ae53451e0d0a6a637427b4bd1a5cf948f90' 
  AND token = 'YYBTmp6Sg7s26/92zbmZCNfqpB/K7vfeBaFDBxBJDOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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