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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6a04952ca93736df3603d9a939a573f3d93d3186cb2026d1b4a7fea1d39da6fb' 
  AND token = 'wkQMKgVebJFo3ycuct/JZ1nk1DgbaVfm/bTyT+rQ2jY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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