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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02a577c3b2df2eb6212b515a63f83fc12f5105807c8189867ccb88f15e275d64' 
  AND token = 'OD2bbnxtOf/toTAj24hEy6Ce8n0eC/qqk4T+KOKO3Ig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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