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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5e5e10354e2558fc4d5bf3902a94633a7346e95c8c17b3bee6d7b75d65757ad9' 
  AND token = '7nL/Pg0Jn4cbX6Iv9WHQ/f9i2h/B/Qk1M656GklAY94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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