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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06fa1520199d7e8358f99dc3b9983da63e5ea4ed30be019c695ab0ea4d805e8e' 
  AND token = 'poVWqlSJpGk8NII1EzsDed3QtPT64u/LnDjPP6N+Fk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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