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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e8b203899c0066637330fd4be63f98c17401110bc9ff00f404dc7547b1599fb3' 
  AND token = 'Cog60bnz6EaJ9MP9ktqtmk9tha1Jd1fmaNQI1UKwGXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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