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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd35583dd104d9f85227037df4b0e462011594c1d7c59ac9140fc59261c88a188' 
  AND token = 'y0vi0VWHENQhqinZZ7/toqwCCTFSl57ua4QDJ10yhKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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