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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '17119a804d9c9d21f44b7602fce44b07f4e4f0289009210c362616530eb742a6' 
  AND token = 'E8ook6+9/V4vjG+EC0Mb4TgSd3GaT2tpMcf3i9ogO8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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