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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '022a40e1bb3ae61836d2fa29eb91f14e5898ab8d0adcf8c7585b92afff6fad2f' 
  AND token = '6dl+woC/UyHJTuxQ1iL2mVtzjYbycDJ55PNR5+nBi+w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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