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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aba1cc1c66d8a055d2d7428e82d9476a6855e535d6797cf90b2e475cc501b4a' 
  AND token = 'PCgYkGYGbI6Zf4Zg10C+46iHPmkW1ZT8lxGR941bpTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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