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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5fb068bab55472b33d8ed7984fe3a1f0076692ebc2647282d0a7e5d3c046785' 
  AND token = '3UpueGfSwqyerNxkOf1dkB/aOnomConSzElifL3gCHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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