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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'fca897cf316d1f0e957148113aad69c5d2f67aab528de2adb5b25e46de6963d8' 
  AND token = 'Ii9y6dzs2ncU2xZXkmenhoV7B3Z2sODy4rkbJvrRq1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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