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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26aa7a732fdfefd852a38308e3b87ca0e34be58ca72d470bb86571ecfe37445c' 
  AND token = 'NSnZhctR5Sw9/7dQ79zg4G/zWxQnl/C7ym+dfm85d18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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