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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95a10bb39ad4ef9e934436afd90d4a203723f5494bf543710207d91c9a31c237' 
  AND token = 'q5z31BcZW8vPgVnj9PHO31p6MWtHl95hXfCh6mnUgjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}