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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67d2292a545bb0ccfb6d0d8af82c3e0268651c47349a3f460a5efb4e01bfeff1' 
  AND token = 'itwcme+EIwfaR7Go/M9+mWK9fgxMsXbGb95POc8CbPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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