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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2324f8a433f52f3f0108c9ec6615f4bfc1e9d6350d5a82bf60cb1af76f0eabad' 
  AND token = 'yyD/iY7KGHSscOa5+o4gyj2U7/84I9wGsupQ08ho6eY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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