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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10a65e0c43ae3a411c61199adb6088e3926fa7fbf9372434601312656607546a' 
  AND token = 'JhL71gRmC7+tLrqDo55gr4Jlcg5EsajfGAmILLc4XPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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