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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bfb65327a4977fe7e7a4488157928c9812256f84272b1176223ebed5db8f2617' 
  AND token = '+mdbTlTeQJQA4qbtXae1mcUQ+6IQVwawx7xKZOyuBB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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